The bed base cover, together with the mattress protector, is an essential accessory to protect and extend the life of your mattress. It is placed between the mattress and the bed base and serves the function of protecting against both the mattress rubbing against the wooden slats and the dust that lurks under the bed. It also absorbs moisture. Mollyflex bed base covers are made of polyester fibre and can be washed at 30°C.